The mail.de Leak Gives Attackers Everything to Hijack 176 Accounts

On July 29, 2026, HEROIC analysts spotted a fresh combolist uploaded to Telegram containing 176 records tied to mail.de, a German webmail provider. Each record pairs an email address with a plaintext password and a source URL.

Why This Is Dangerous

With a working email and password in hand, an attacker does not need to guess or crack anything. They can log directly into the account, read private messages, reset passwords on other services tied to that email, and lock the real owner out.

What Was Exposed in the mail.de Leak

• Email addresses
• Plaintext passwords
• URLs linking each credential to its source

Why This Matters

An email account is often the master key to someone's digital life. Whoever controls it can trigger password resets for banking, shopping, and social media accounts, making this small leak a launchpad for much larger fraud and identity theft.

How a Combolist Attack Works

Combolists like this one are built by criminals who pull username and password pairs from breaches, phishing pages, or infected devices and bundle them into a single file. Once shared, anyone can use automated tools to try each pair against mail.de or other sites, a method called credential stuffing that turns a short list into a wide-reaching attack.

Check If You Are Affected

Use HEROIC's free breach scanner to check your email address against more than 400 billion exposed records, including this mail.de leak. If your account shows up, change your password right away and turn on two-factor authentication.